Stimulating wells in unconsolidated formations

E - Fixed Constructions – 21 – B

Patent

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Details

E21B 43/267 (2006.01) C09K 8/575 (2006.01) C09K 8/80 (2006.01) E21B 43/02 (2006.01) E21B 43/22 (2006.01)

Patent

CA 2232051

The present invention provides methods of stimulating fluid production from an unconsolidated formation penetrated by a wellbore while preventing the migration of formation sands with fluids produced from the formation. The methods basically comprise the steps of injecting a hardenable resin composition into a portion of the formation surrounding the wellbore whereby that portion is consolidated into a hard permeable mass, forming an indentation in the wellbore to facilitate the initiation of a fracture in the consolidated portion of the formation, creating a fracture in the formation extending from the wellbore through the consolidated portion of the formation into an unconsolidated portion thereof and depositing hardenable resin composition coated proppant in the fracture whereby the proppant is consolidated into a hard permeable mass.

La présente invention vise un procédé servant à stimuler la production de fluides dans un gisement non consolidé pénétré par un trou de forage tout en prévenant la migration des sables avec les fluides ainsi produits. Les méthodes comportent essentiellement les étapes suivantes : injection d'un composition de résine durcissable aux abords du trou de forage aux fins de consolidation de la zone injectée sous forme de masse dure et perméable; réalisation d'une indentation dans le trou de forage aux fins de fracturation de la zone consolidée du gisement; création d'une fracture en extension à travers la zone consolidée et jusqu'à la zone non consolidée, suivi de l'injection d'un agent de soutènement revêtu d'une composition de résine durcissable aux fins de consolidation sous forme de masse dure et perméable.

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